---
schema: 1
type: term
title: '**SDK**'
description: >-
  **SDK** (software development kit) — as used in this channel's material, the
  packaged set of developer tooling built alongside an API so other developers
  can integrate with a service. Stainless, _the API company_, builds the APIs
  and SDKs for major AI companies such as **OpenAI** and **Anthropic**.
  [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@22]
canonical: 'https://liquidgold.cc/channel/everyinc/explore/term/sdk-a5b15d67c53a'
markdown: 'https://liquidgold.cc/channel/everyinc/explore/term/sdk-a5b15d67c53a.md'
llms: null
parent: 'https://liquidgold.cc/channel/everyinc/llms.txt'
channel: everyinc
updated: '2026-10-23T22:12:35.346Z'
language: null
children: []
---


# \*\*SDK\*\*

Canonical: https://liquidgold.cc/channel/everyinc/explore/term/sdk-a5b15d67c53a

Parent: [Channel index](https://liquidgold.cc/channel/everyinc/llms.txt)

## Definition

**SDK** (software development kit) — as used in this channel's material, the packaged set of developer tooling built alongside an API so other developers can integrate with a service. Stainless, _the API company_, builds the APIs and SDKs for major AI companies such as **OpenAI** and **Anthropic**. [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@22]

In this channel's captured material, an **SDK** (software development kit) is the developer-facing package that goes hand-in-hand with an **API**: it is what Stainless, described as *the API company*, builds and ships so that other developers can actually connect their software to a service. [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@22] The most concrete usage comes from the founder of **Stainless**, who explains that his company builds the APIs **and** the SDKs for major AI companies like **OpenAI** and **Anthropic** — with **Anthropic** now a customer in a much bigger sense, having bought the dev-tools business for a reported $300M. [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@22] The same framing appears when Stainless's remit is summarized: *they build the APIs and SDKs for major AI companies*, and they're now extending that same work into building **MCP servers**. [^ea9761fa-0184-555e-be30-4928a6682680@22] [^ea9761fa-0184-555e-be30-4928a6682680@34] SDKs matter here because they sit inside the conversation about **MCP (Model Context Protocol)** — the technology that turns any website or web service into a set of tools an AI can use natively to get work done. The episode's thesis is that companies that understand how to do MCP well are positioned to win over the next decade, and the SDK-building layer (Stainless) is one of the pieces of *AI infrastructure* — dev tools, standard protocols, and enterprise agent platforms — that turns MCP from an idea into working infrastructure.  - **SDK = software development kit**, the packaged developer tooling built alongside an API. - In this material, **Stainless** is the company that builds the APIs *and* SDKs for **OpenAI** and **Anthropic**. [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@22] - Stainless is now applying the same expertise to building **MCP servers**. [^ea9761fa-0184-555e-be30-4928a6682680@34]